ExpertEasy1 markMultiple Choice
AQA GCSE · Question 09 · Data Visualization and Representation
Danni records the number of bedrooms and the number of televisions in 11 houses. She has these data that she needs to show as a graph or chart.
Which single graph or chart would be best to represent the data?
choose your answer.
Danni records the number of bedrooms and the number of televisions in 11 houses. She has these data that she needs to show as a graph or chart.
Which single graph or chart would be best to represent the data?
choose your answer.
Answer options:
A.
pie chart
B.
scatter diagram
C.
bar line graph
D.
choropleth map
How to approach this question
Consider the type of data Danni has collected. She has pairs of numerical data for each house (number of bedrooms, number of televisions). This is called bivariate data. Think about which type of graph is specifically designed to show if there is a relationship or correlation between two numerical variables.
Full Answer
B.scatter diagram✓ Correct
scatter diagram
Danni has collected paired numerical data: for each house, she has a value for the number of bedrooms and a value for the number of televisions. The purpose of plotting this data would be to see if there is a relationship (correlation) between the two variables (e.g., do houses with more bedrooms tend to have more televisions?). A scatter diagram is the standard statistical tool for visualising the relationship between two quantitative variables. Each pair of values is plotted as a single point on the graph.
Common mistakes
✗ Choosing a pie chart, which is for parts of a whole.
✗ Choosing a bar line graph, which is for frequencies of a single variable.
✗ Choosing a choropleth map, which is for geographical data.
Practice the full AQA GCSE Statistics Foundation Tier Paper 1
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